This will be the first launch of an older version Falcon 9 rocket since one exploded last summer, destroying a Dragon spacecraft en route to the International Space Station. The cause of the explosion was utimately determined to be a weak strut, allowing the company to feel comfortable using their excess supply of older rockets for payloads that don’t need the full force of the newly-enhanced Falcon 9.

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The oceanographic satellite is the joint project of NASA and the National Oceanic and Atmospheric Administration (NOAA) designed to measure sea surface topography. It is scheduled to launch out of California at 10:42am on Sunday morning, with a backup launch window on Monday morning. Gizmodo staff will be on location to cover the launch.